JP3457652B2 - Arc welding wire and wire drawing method - Google Patents

Arc welding wire and wire drawing method

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Publication number
JP3457652B2
JP3457652B2 JP2001189298A JP2001189298A JP3457652B2 JP 3457652 B2 JP3457652 B2 JP 3457652B2 JP 2001189298 A JP2001189298 A JP 2001189298A JP 2001189298 A JP2001189298 A JP 2001189298A JP 3457652 B2 JP3457652 B2 JP 3457652B2
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JP
Japan
Prior art keywords
wire
contact
die
wire drawing
area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2001189298A
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Japanese (ja)
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JP2002086290A (en
Inventor
▲義▼▲徳▼ 李
在炯 李
Original Assignee
株式会社キスウェル
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/04—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of bars or wire
    • B21C37/045—Manufacture of wire or bars with particular section or properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
    • B21C1/12—Regulating or controlling speed of drawing drums, e.g. to influence tension; Drives; Stop or relief mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B23K35/0261—Rods, electrodes, wires
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/40—Making wire or rods for soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3053—Fe as the principal constituent
    • B23K35/308—Fe as the principal constituent with Cr as next major constituent

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Wire Processing (AREA)

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、アーク溶接用ワイ
ヤに関し、より詳しくは、ワイヤの最終製品線の残留応
力分布を均一にし、送給性を改善させたアーク溶接用ワ
イヤに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arc welding wire, and more particularly to an arc welding wire having a uniform residual stress distribution in the final product line of the wire and improved feedability.

【０００２】[0002]

【従来の技術】アーク溶接用ワイヤの場合、溶接という
メカニズムのためにワイヤが溶加材として添加されるこ
とによって、すなわちスプール(Spool)やぺールパック
(Pail Pack)状態に巻き取られ、溶接時に送給ローラ及
び溶接トーチケーブルを通過して電気的なアーク熱によ
って溶融され、母材と共に接合されるため、安定的な溶
接のためには、優れた送給性の確保が重要である。ま
た、最近、溶接作業は自動化、高能率化が求められてい
るため、速い送給速度での安定的なワイヤの送給を要求
していることが現実であって、ワイヤの送給性向上に対
する要求はさらに強くなっている。2. Description of the Related Art In the case of arc welding wire, the wire is added as a filler metal due to the mechanism of welding, that is, spool or pail pack.
It is wound into a (Pail Pack) state, passes through the feeding roller and welding torch cable during welding, is melted by the electric arc heat, and is joined together with the base metal, making it excellent for stable welding. It is important to secure the delivery quality. In addition, recently, since the welding work is required to be automated and highly efficient, it is a reality that stable wire feeding at a high feeding speed is required, and the wire feeding performance is improved. The demand for is getting stronger.

【０００３】一般に、溶接用ワイヤを含む各種のワイヤ
は、最初の原線(ROD)から最終製品のワイヤになるまで
多様なサイズのダイスを通過し、太径から小径に段階的
に減面され、最終製品線に伸線されるようになる。Generally, various kinds of wires including welding wires are passed through dies of various sizes from the first original wire (ROD) to the final product wire, and are gradually reduced in diameter from large diameter to small diameter. , Will be drawn to the final product line.

【０００４】伸線(WIRE DRAWING)工程において、ワイヤ
の送給性に関わる因子としては、最終製品線を所望の線
径に引き抜く（伸線）ための減面率に従う伸線スケジュ
ール、ワイヤの引張強度や延伸率の偏差の調整を通じて
の内部応力の分布、ワイヤの直進性等が有り得る。この
うち、ワイヤの内部応力分布の均一性が、ワイヤの送給
性において最も重要に考慮されるべき因子である。In the wire drawing process, the factors relating to the wire feedability are the wire drawing schedule according to the area reduction ratio for drawing the final product wire to the desired wire diameter (wire drawing), and the wire drawing. There may be distribution of internal stress, straightness of wire, etc. through adjustment of the deviation of strength and draw ratio. Among these, the uniformity of the internal stress distribution of the wire is the most important factor in the wire feedability.

【０００５】従来では、ワイヤの送給性の向上のための
伸線工程における管理は、単純に太径を小径にする際の
減面率のみを考慮するとか、ワイヤの引張強度や延伸率
の偏差の調整を通じての内部応力分布の均一化を考慮す
るのが一般的であった。Conventionally, in the control of the wire drawing process for improving the wire feedability, only the area reduction rate when simply changing the large diameter from the small diameter is taken into consideration, or the tensile strength and the drawing rate of the wire are controlled. It was common to consider homogenization of the internal stress distribution through adjustment of the deviation.

【０００６】しかし、伸線工程において、ワイヤの延伸
（伸線）が重なる度にワイヤの外部、すなわち、ダイス
と接触される表面部は、中心部に比して組織がより緻密
になって硬化され、このような硬化が重なる度にワイヤ
の延伸は不可能になるのみならず、ワイヤの外部と中心
部の残留応力の分布はより不均一になっていく。従っ
て、従来の単純な減面率による伸線スケジュールの調整
と伸線線の引張強度の管理としては、最終製品線におけ
る外部と内部との残留応力の分布を均一にするには限界
がある。[0006] However, in the wire drawing process, every time wire drawing (wire drawing) is overlapped, the outer portion of the wire, that is, the surface portion contacting with the die, has a denser structure than the central portion and hardens. However, each time such hardening overlaps, not only the wire cannot be stretched, but also the distribution of residual stress in the outer portion and the central portion of the wire becomes more uneven. Therefore, the conventional simple adjustment of the wire drawing schedule by the reduction of area and the control of the tensile strength of the wire drawing have a limit to make the distribution of the residual stress inside and outside the final product wire uniform.

【０００７】また、連続するワイヤの伸線に伴うワイヤ
表面の硬化は、ワイヤと接触するダイスの摩耗を誘発さ
せ、伸線線の表面に損傷を加えることになり、最終製品
線の品質に悪影響を及ぼし、結果的には、溶接時、円滑
なワイヤの送給を妨害することになる。Further, the hardening of the wire surface caused by the continuous wire drawing causes the wear of the die contacting with the wire, which damages the surface of the drawn wire and adversely affects the quality of the final product wire. As a result, the smooth wire feeding is hindered during welding.

【０００８】かかる表面が硬化されたワイヤとダイスと
の接触に伴うダイスの摩耗は、ワイヤとの接触面積を不
均一にする原因になり、このため、最終製品線の長手方
向への残留応力の分布も不均一になる。よって、溶接
時、ワイヤが送給ローラ及び溶接トーチケーブルを通過
する際、荷重が局部的に集中され、ワイヤが送給され
ず、捻るか極端にもつれる原因になる。The wear of the die due to the contact between the wire having the hardened surface and the die causes the contact area with the wire to become non-uniform, and therefore the residual stress in the longitudinal direction of the final product line is reduced. The distribution will also be non-uniform. Therefore, at the time of welding, when the wire passes through the feeding roller and the welding torch cable, the load is locally concentrated, the wire is not fed, and the wire is twisted or extremely entangled.

【０００９】[0009]

【発明が解決しようとする課題】従って、本発明は、伸
線工程におけるワイヤ断面の硬度偏差とワイヤの長手方
向の硬度偏差の調整を通じてワイヤの内部応力の分布を
均一にし、アーク溶接用ワイヤの送給性を向上させる手
段を提供することを目的とする。Therefore, according to the present invention, the internal stress distribution of the wire is made uniform by adjusting the hardness deviation of the wire cross section and the hardness deviation of the wire in the longitudinal direction in the wire drawing process, thereby making the arc welding wire uniform. It is intended to provide a means for improving feedability.

【００１０】本発明のさらなる目的は、ワイヤとダイス
とが接触することにより生じる接触面積を一定範囲に管
理し、ワイヤの硬度偏差を減少させることによって、ワ
イヤの残留応力の分布が均一なアーク溶接用ワイヤを提
供することにある。A further object of the present invention is to control the contact area caused by the contact between the wire and the die within a certain range and reduce the hardness deviation of the wire, thereby making arc welding with a uniform distribution of the residual stress of the wire. To provide a wire for use.

【００１１】本発明のさらに他の目的は、伸線過程にお
いて、ワイヤの最終伸線段階を２段階に分離し、その第
１の段階は、ワイヤとダイスとの接触角の調整を通じて
ワイヤ断面上の中心部と表面との硬度偏差を減少させ、
第２の段階では、ワイヤが矯正されるベアリング部の長
手の調整を通じてワイヤの長手方向の硬度偏差を減少さ
せることによって、ワイヤ内部の硬度偏差を減少させる
ことが出来るアーク溶接用ワイヤの伸線方法を提供する
ことにある。Still another object of the present invention is to separate the final drawing step of the wire into two steps in the drawing process, and the first step is to adjust the contact angle between the wire and the die on the wire cross section. The hardness deviation between the center and the surface of the
In the second stage, a method of drawing a wire for arc welding capable of reducing a hardness deviation in a wire by reducing a hardness deviation in a longitudinal direction of the wire by adjusting a length of a bearing portion where the wire is straightened. To provide.

【００１２】[0012]

【課題を解決するための手段】前記目的を達成するため
に、本発明は、１次伸線と、前記１次伸線後のワイヤの
加工硬化を回復するための熱処理と、２次伸線と、前記
２次伸線後のワイヤ内部の残留応力を除去するための熱
処理、及び３次伸線を順次行うことにより製造され、前
記３次伸線が、前記ワイヤを実質的に減面させるため
に、伸線されるワイヤとの接触角が小さい減面接触部
と、長さの短いベアリングとを備えた第１ダイスと、前
記第１ダイスに連続的に配置され、前記ワイヤの線径を
矯正するために前記第１ダイスに比べて長さが長いベア
リングによって構成される矯正接触部を持った第２ダイ
スによって連続的に伸線することによって、ビッカース
硬度計で測定した硬度として、ワイヤ断面上の中心部と
表面との硬度差がHv１８以下であり、長手方向の硬度差
がワイヤの任意の２００ｍｍ間隔で測定した時、Hv１５
以下であるアーク溶接用ワイヤを提供する。In order to achieve the above object, the present invention provides a primary wire drawing and a wire after the primary wire drawing.
Heat treatment for recovering work hardening, secondary wire drawing, and
Heat for removing residual stress inside the wire after secondary wire drawing
Manufactured by sequentially performing treatment and third wire drawing,
Note that the third wire drawing substantially reduces the surface of the wire.
, A reduced surface contact part with a small contact angle with the drawn wire
And a first die with a short bearing, front
The wire diameter of the wire is continuously arranged on the first die.
A bear whose length is longer than that of the first die for straightening
Second die with straightening contact consisting of a ring
As a hardness measured by a Vickers hardness meter, the hardness difference between the center and the surface on the wire cross section is Hv18 or less, and the hardness difference in the longitudinal direction of the wire is Hv15 when measured at arbitrary 200 mm intervals
The following arc welding wire is provided.

【００１３】さらに、前記ワイヤの硬度偏差の調整は、
ワイヤとダイスとの接触面積の管理を通じて調整するこ
とが出来、本発明は、次の式で定義される接触面積比を
調整することにより、ワイヤの硬度偏差を調整すること
を特徴とする。 （式） 接触面積比＝減面接触比＋矯正接触比減面接触比＝減面接触部の接触面積／第１ダイスに引き
込まれるワイヤの断面積 矯正接触比＝矯正接触部の接触面積／第２ダイスから引
出されるワイヤの断面積 Furthermore, the adjustment of the hardness deviation of the wire is
It can be adjusted by controlling the contact area between the wire and the die, and the present invention is characterized by adjusting the hardness deviation of the wire by adjusting the contact area ratio defined by the following equation. (Formula) pulling the contact area / first die contact area ratio = area reduction contact ratio +矯 positive contact declined surface contact ratio = reduction of area contact portion
Cross-sectional area of wire to be inserted Straightening contact ratio = contact area of straightening contact part / subtracted from second die
Cross section area of wire

【００１４】前記のさらなる目的を達成するための技術
的手段として、本発明は、１次伸線と、前記１次伸線後
のワイヤの加工硬化を回復するための熱処理と、２次伸
線と、前記２次伸線後のワイヤ内部の残留応力を除去す
るための熱処理、及び３次伸線を包含するアーク溶接用
ワイヤの伸線方法であって、前記３次伸線は、伸線され
るワイヤとの接触角が小さくベアリングの長さが短い第
１ダイスによってワイヤの中心部と表面との硬度差を緩
和する工程と、前記第１ダイスに対して接触角が大きく
ベアリングの長さが長い第２ダイスによるワイヤの長手
方向の硬度差を緩和する工程からなるアーク溶接用ワイ
ヤの伸線方法である。As a technical means for achieving the above-mentioned further object, the present invention provides a primary drawing and a method after the primary drawing.
Heat treatment to recover the work hardening of the wire and secondary drawing
Residual stress inside the wire and the wire after the secondary wire drawing is removed.
For arc welding including heat treatment for heat treatment and tertiary wire drawing
A wire drawing method, wherein the third wire drawing is performed by
Contact angle is small and the bearing length is short.
One die reduces the hardness difference between the center and the surface of the wire.
And the contact angle is large with the first die
Long wire length by the second die with long bearing length
It is a method of drawing an arc welding wire, which comprises a step of relaxing a hardness difference in a direction .

【００１５】[0015]

【発明の実施の形態】以下、添付された図面を参照して
本発明を詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

【００１６】図１ａは、ワイヤが送給ローラを通過する
際の横断面図であり、図１ｂは、ワイヤが送給ローラを
通過する際の一部縦断面図、図２は、ワイヤ（Ｗ）がダ
イス（Ｄ）を通過する際に生じる減面接触部（２０）と
矯正接触部（２００）の部分概略図、図３は、本発明に
よる伸線工程の最終段階での伸線を２段階に分離する実
施例の概略図、図４は、本発明の実施例において適用し
たワイヤの送給性テスト方法(２ターン送給性試験)の概
略図である。FIG. 1a is a cross-sectional view of the wire passing through the feeding roller, FIG. 1b is a partial vertical cross-sectional view of the wire passing through the feeding roller, and FIG. ) Is a partial schematic view of the surface-reducing contact portion (20) and the straightening contact portion (200) generated when passing through the die (D). FIG. 3 shows the wire drawing at the final stage of the wire drawing process according to the present invention. FIG. 4 is a schematic view of an embodiment in which the wire is separated into stages, and FIG. 4 is a schematic view of a wire feedability test method (2-turn feedability test) applied in the embodiment of the present invention.

【００１７】ワイヤ（Ｗ）とダイス（Ｄ）との接触面積
を決定するのは、大きく、ｉ） ワイヤ（Ｗ）の実際的
な減面が行われるダイス（Ｄ）とワイヤ（Ｗ）との接触
面積と、ｉｉ） ワイヤの直進性及びワイヤの直進性に
伴うワイヤ（Ｗ）とベアリング部（２００）との接触面
積である。前記のベアリング部（２００）でワイヤの線
径は矯正され、直進性が向上する。The contact area between the wire (W) and the die (D) is largely determined. I) The area between the die (D) and the wire (W) where the surface reduction of the wire (W) is actually performed. The contact area is ii) the straightness of the wire and the contact area between the wire (W) and the bearing portion (200) due to the straightness of the wire. The wire diameter of the wire is corrected by the bearing part (200) to improve straightness.

【００１８】先ず、前者の場合を考察すると、ワイヤ
（Ｗ）が実際的に減面される部位（減面接触部）の接触
面積が少なすぎる場合には、ワイヤの（円形）断面上の
内部（中心部）と外部（表面）との残留応力の差が大き
くなり、ワイヤの一側外部と他側外部との硬度差が大き
くなって、溶接時、ワイヤが送給ローラを通過する際受
ける連続的な局部荷重（図１ａと、図１ｂを参考）に耐
えられず、ワイヤが捩じれてチップ先端の揺れを招くよ
うになって、アーク不安定の原因になり得る。また、接
触面積が多すぎる場合には、局部的な加工硬化現象によ
りワイヤの表面品質に悪い影響を及ぼすようになり、極
端な場合には、ワイヤの内部（中心部）と外部との応力
の偏差が大きくなって伸線が不可能にもなり得る。First, considering the former case, when the contact area of the portion where the wire (W) is actually reduced (reduced contact portion) is too small, the inside of the (circular) cross section of the wire is reduced. The difference in residual stress between the (center) and the outside (surface) becomes large, and the difference in hardness between the outside of one side of the wire and the outside of the other side becomes large, and the wire receives when passing through the feed roller during welding. It is unable to withstand continuous local loads (see FIGS. 1a and 1b) and the wire twists causing tip tip sway, which can cause arc instability. In addition, if the contact area is too large, the local work hardening phenomenon adversely affects the surface quality of the wire. In the extreme case, the stress between the inside (center) and the outside of the wire may be adversely affected. The deviation may become large and wire drawing may become impossible.

【００１９】次に、後者の場合を考察すると、伸線され
るワイヤ（Ｗ）とベアリング部（２００）との接触面積
が少なすぎる場合には、ワイヤ（Ｗ）の長手方向への内
部応力の偏差が大きくなってワイヤの送給は 円滑に行
われず、これはワイヤが送給ローラを通過する時受ける
連続的且つ局部的な荷重をワイヤが耐えられず、捻るか
もつれて送給ローラ（１）から離脱する原因となるか、
ワイヤ（Ｗ）の直進性が足りなくなって溶接時に送給ロ
ーラ（１）の通過後、又はケーブル通過後ワイヤが変形
されやすく、これはワイヤがコンタクトチップ(Contact
Tip)を通過した後にも、直進性を有することが出来な
くなり、溶接欠陥（蛇行ビード）を招く。Next, considering the latter case, when the contact area between the wire (W) to be drawn and the bearing portion (200) is too small, the internal stress of the wire (W) in the longitudinal direction is increased. The deviation is so great that the wire is not fed smoothly, which means that the wire cannot withstand the continuous and localized load that the wire experiences as it passes through the feed roller, twisting or becoming entangled. ) Will cause you to leave
The straightness of the wire (W) is insufficient and the wire is easily deformed after passing the feeding roller (1) or after passing the cable during welding.
Even after passing through the tip), it becomes impossible to have straightness and leads to welding defects (meandering beads).

【００２０】従来は、かかる内部応力の偏差を管理する
方法として、安定した減面率による製品線の引張強度や
延伸率の偏差を管理したが、この方法では、製品線の微
細な内部応力、すなわちワイヤが送給時に荷重を受ける
外部表面の応力と、かかる表面からの荷重を伝達される
ようになるワイヤ中心部の応力を管理するには限界があ
る。Conventionally, as a method of controlling the deviation of the internal stress, the deviation of the tensile strength and the drawing rate of the product line due to the stable surface reduction rate is managed, but in this method, the fine internal stress of the product line, That is, there is a limit in managing the stress on the outer surface of the wire that receives a load during feeding and the stress on the central portion of the wire where the load from the surface is transmitted.

【００２１】従って、本発明者らは、図２に示したよう
に、ワイヤがダイスを通過する時、実際的に減面される
接触部位を減面接触部（２０）及びその面積を減面接触
面積といい、ワイヤの線径が矯正される接触部位を矯正
接触部（２００）及びその面積を矯正接触面積といい、
前記減面接触面積と矯正接触面積を合算した面積を管理
することによって、ワイヤの内部応力の分布を均一にす
ることが可能であることを見出して、本発明に至ったも
のである。Therefore, as shown in FIG. 2, when the wire passes through the die, the present inventors reduce the contact area which is actually reduced by reducing the contact area (20) and the area thereof. The contact area is referred to as the contact area, the contact portion where the wire diameter is corrected is referred to as the corrective contact portion (200) and the area thereof is referred to as the corrective contact area,
The present invention has been completed by finding that it is possible to make the distribution of the internal stress of the wire uniform by controlling the total area of the reduced surface contact area and the correction contact area.

【００２２】また、かかる最終製品線の残留応力の分布
は、ワイヤの断面上の中心部と表面部との硬度偏差及び
ワイヤの長手方向の硬度偏差と密接な関連があることを
見出した。すなわち、ワイヤの送給性向上と関連するワ
イヤ自体の物性は、ワイヤの断面と長手方向の硬度偏差
の減少に伴う内部応力の均一性であることを認識すると
共に、ワイヤの硬度偏差の減少はワイヤとダイスとの接
触面積を一定範囲に管理することによって達成出来るこ
とを見出したのである。接触面積の管理は、伸線工程の
最終伸線段階を管理することが重要である。Further, it has been found that the distribution of the residual stress in the final product line is closely related to the hardness deviation between the central portion and the surface portion on the cross section of the wire and the hardness deviation in the longitudinal direction of the wire. That is, it is recognized that the physical property of the wire itself, which is related to the improvement of the wire feedability, is the uniformity of the internal stress due to the decrease in the hardness deviation in the cross section and the longitudinal direction of the wire, and the decrease in the hardness deviation of the wire is They have found that this can be achieved by controlling the contact area between the wire and the die within a certain range. To control the contact area, it is important to control the final wire drawing stage of the wire drawing process.

【００２３】伸線工程は、通常に、ワイヤ（原線）を複
数の段階にかけて引き抜くことによって、当初の太径か
ら徐々に小径化していくが、多段階の伸線過程におい
て、ワイヤに残留するようになる内部応力は、最終伸線
段階の直前のワイヤに全て反映されているといえる。従
って、ワイヤに残留した内部応力の調整は最終伸線段階
で調整する必要があることになるのである。In the wire drawing process, the wire (original wire) is usually drawn out in a plurality of steps to gradually reduce the diameter from the initial large diameter, but the wire remains in the wire in a multi-step drawing process. It can be said that the internal stress that becomes such is all reflected on the wire immediately before the final wire drawing stage. Therefore, it is necessary to adjust the internal stress remaining in the wire in the final wire drawing stage.

【００２４】具体的には、図３に示すように、最終伸線
段階における伸線を２段階に分離し、第１段階では、ワ
イヤ（Ｗ）とダイス（Ｄ）とが接触する角度を小さくし
てワイヤ断面上の硬度偏差を減少させ、溶接時ワイヤの
捩じれによるチップ先端の揺れを防止し、第２段階で
は、ダイスのベアリング長手、すなわちワイヤが矯正さ
れるベアリング部（２００）の長手を長くしてワイヤの
長手方向の硬度偏差を減少させ、ワイヤがケーブルを通
過する時、折曲するか捩じれて生じる溶接欠陥（蛇行ビ
ード）を防止することである。Specifically, as shown in FIG. 3, the wire drawing in the final wire drawing step is separated into two steps, and in the first step, the contact angle between the wire (W) and the die (D) is reduced. The hardness deviation on the wire cross section is reduced, and the tip of the wire is prevented from swaying due to the twisting of the wire during welding. In the second step, the bearing length of the die, that is, the length of the bearing portion (200) where the wire is straightened, The lengthening is to reduce the longitudinal hardness deviation of the wire and to prevent welding defects (serpentine bead) caused by bending or twisting of the wire as it passes through the cable.

【００２５】本発明は、最終伸線段階において、ワイヤ
が２つのダイスを通過する際発生する接触面積を管理す
るために、２つのダイスに対する減面接触面比と矯正接
触面比の値を合わせて、それを接触面積比と定義し、そ
の値を一定範囲、具体的には、３〜３．５に管理する
と、その範囲内では、ワイヤの断面及び長手方向の硬度
偏差が減少され、伸線時にワイヤの残留応力が著しく減
少する点に特徴がある。In the present invention, in order to control the contact area generated when the wire passes through the two dies in the final wire drawing stage, the values of the reduction contact surface ratio and the straightening contact surface ratio for the two dies are matched. Then, it is defined as a contact area ratio, and when the value is controlled to a certain range, specifically, 3 to 3.5, the hardness deviation in the cross section and the longitudinal direction of the wire is reduced and the elongation is reduced within the range. It is characterized in that the residual stress of the wire during wire drawing is significantly reduced.

【００２６】[0026]

【実施例】以下、実施例をあげて本発明を説明する。EXAMPLES The present invention will be described below with reference to examples.

【００２７】ワイヤの断面及び長手方向の硬度偏差と溶
接性との関係を解明するために、伸線時に加工硬化を多
く受けるステンレス溶接用ワイヤをもって溶接性評価を
行った。In order to elucidate the relationship between the hardness deviation in the cross-section and the longitudinal direction of the wire and the weldability, the weldability was evaluated using a stainless welding wire which is often subjected to work hardening during wire drawing.

【００２８】[0028]

【表１】 [Table 1]

【００２９】ワイヤの減面は、５．５ｍｍ→１．２ｍｍ
で、適用鋼種は、ＡＷＳ ＥＲ３０９、ＪＩＳ Ｙ３０
９である。The reduction area of the wire is 5.5 mm → 1.2 mm
The applicable steel types are AWS ER309 and JIS Y30.
It is 9.

【００３０】送給性試験は、図４に示すように、２ター
ン（TURN）形態にし、溶接条件は、１９０Ａ−２００Ｖ
で実施した。伸線工程は、１次伸線→熱処理→２次伸線
→熱処理→３次伸線（最終伸線）の順番に行い、最終伸
線段階は、伸線（引き抜き）を２段階に分離して遂行
し、（最終伸線工程での）各伸線段階における接触面積
比を変更し、夫々のワイヤに対し、ビッカース硬度試験
器(Vickers hardnesstester)で硬度を測定した。As shown in FIG. 4, the feedability test was conducted in a two-turn (TURN) form, and the welding condition was 190A-200V.
It was carried out in. The wire drawing process is carried out in the order of primary wire drawing → heat treatment → secondary wire drawing → heat treatment → third wire drawing (final wire drawing). The final wire drawing stage is to separate wire drawing (drawing) into two steps. Then, the contact area ratio at each wire drawing stage (in the final wire drawing step) was changed, and the hardness of each wire was measured with a Vickers hardness tester.

【００３１】伸線工程において、熱処理は１次伸線後、
及び最終伸線前に行うようになるが、１次伸線後の熱処
理はステンレス鋼の場合、加工硬化を多く受けるため、
継続する伸線のために伸線線の加工硬化を解いてやる熱
処理であり、最終伸線前の熱処理は、最終製品線の内部
残留応力を最小化し、且つ均一化のための熱処理であ
る。これは、ワイヤがダイスを通過する際の応力の緩和
も重要であるが、引込み線（引込みワイヤ）の残留応力
の分布も重要なためである。また、最終伸線前の熱処理
は、１次伸線後、応力がある程度解消されたが、継続す
る２次伸線により内部の残留応力の分布が不均一であっ
て、良好な送給性を示す程度の残留応力分布を得難いた
め、最終伸線前の熱処理は重要な工程になる。In the wire drawing step, heat treatment is performed after the primary wire drawing.
And before the final wire drawing, the heat treatment after the primary wire drawing is subject to a lot of work hardening in the case of stainless steel.
It is a heat treatment for releasing work hardening of the drawn wire for continuous drawing, and the heat treatment before the final wire drawing is a heat treatment for minimizing the internal residual stress of the final product wire and homogenizing it. This is because the relaxation of the stress when the wire passes through the die is important, but the distribution of the residual stress of the service wire (service wire) is also important. In the heat treatment before the final wire drawing, the stress was relieved to some extent after the primary wire drawing, but the distribution of the residual stress inside was uneven due to the continuous secondary wire drawing, and good feedability was obtained. Since it is difficult to obtain the residual stress distribution as shown, heat treatment before final wire drawing is an important step.

【００３２】硬度偏差は、断面硬度偏差の場合、ワイヤ
の断面中心部と表面の硬度を測定してその差を求め、長
手方向の場合、ワイヤの任意の２００ｍｍ間隔で連続５
回硬度を測定してその差の平均を求めた（３つの試料の
平均値）。In the case of the cross-section hardness deviation, the hardness deviation is obtained by measuring the hardness between the center and the surface of the cross-section of the wire, and in the longitudinal direction, it is continuously measured at arbitrary 200 mm intervals of the wire.
The hardness was measured and the difference was averaged (average value of three samples).

【００３３】上述したように、最終伸線（すなわち、３
次伸線）における伸線を２つのダイス（第１ダイス及び
第２ダイス）を使用した２段階に分離し、第１ダイスに
よる第１の段階は、減面接触比、すなわちワイヤとダイ
スとの接触角の調整を通じて減面接触面積を規制し、第
２ダイスによる第２の段階では、矯正接触比、すなわち
伸線の線径を矯正する段階における矯正接触面積を規制
し、ワイヤの断面上の硬度偏差及び長手方向の硬度偏差
を減少させ、ワイヤの残留応力の分布を均一にしたもの
である。すなわち、第１の段階では、ワイヤと第１ダイ
スとが接触する角度を小さくし、ワイヤ断面上の硬度偏
差を減少させ、溶接時にワイヤの捩じれによるチップ先
端の揺れを防止し、第２の段階では、第２ダイスのベア
リング長手、すなわちワイヤが矯正されるベアリング部
の長手を長くし、ワイヤの長手方向の硬度偏差を減少さ
せ、ワイヤがケーブルを通過する時、折曲するか捩じれ
ることによって生じる溶接欠陥（蛇行ビード）を防止し
た。前記過程において、第１の伸線段階でのワイヤと第
１ダイスとの接触角の大きさと、第２の段階でのベアリ
ング部の長手に沿う接触面積比への寄与程度は、接触面
積比が３乃至３．５の範囲内で両者とも約１／３（１乃
至１．１７）乃至１／２（１．５乃至１．７５）である
ことが要求される。As described above, the final wire drawing (ie, 3
For the second wire drawing, draw two dies (first die and
The second die is used to separate into two stages, and the first die is used.
According first stage, area reduction contact ratio, namely to restrict the reduction in area contact area through adjustment of the contact angle between the wire and the die, the
In the second stage using two dies , the straightening contact ratio, that is, the straightening contact area at the stage of straightening the wire diameter of the wire drawing is regulated to reduce the hardness deviation on the cross section of the wire and the hardness deviation in the longitudinal direction. This is a uniform distribution of residual stress. That is, in the first stage, the contact angle between the wire and the first die is reduced, the hardness deviation on the wire cross section is reduced, and the tip of the tip is prevented from swaying due to the twisting of the wire during welding. Then, by lengthening the bearing length of the second die, that is, the length of the bearing portion where the wire is straightened, reducing the hardness deviation in the longitudinal direction of the wire, and bending or twisting when the wire passes through the cable. Prevented welding defects (meandering beads). In the above process, first the wire in the first drawing stage
The magnitude of the contact angle with one die and the degree of contribution to the contact area ratio along the length of the bearing portion in the second stage are about 1/3 for both within the contact area ratio of 3 to 3.5. It is required to be (1 to 1.17) to 1/2 (1.5 to 1.75).

【００３４】前出の表で示したように、硬度偏差が断面
の中心部と表面との差、すなわち断面硬度偏差がビッカ
ース硬度で１８以下、長手方向の場合、ビッカース硬度
で１５以下の時、最も安定した送給負荷を示している。
円断面と長手方向の硬度偏差が管理範囲内にある実施例
１、２、４の場合、送給負荷が低いことに伴って送給性
が良好であるのみならず、安定したアークを示した。し
かし、実施例３、５の場合は、円断面または長手方向の
いずれか一方の硬度偏差の値が管理範囲内に含まれてお
らず、送給負荷が高くなる傾向を示している。これは、
接触面積比が減面接触比と矯正接触比の和からなるため
であり、接触面積比の総和のみでなく、減面接触比と矯
正接触比が同時に一定範囲内に管理されなければ、安定
した送給性を確保することが出来ないということを示し
ているものといえる。As shown in the above table, the hardness deviation is the difference between the center and the surface of the cross section, that is, the cross section hardness deviation is the Vickers.
Source hardness of 18 or less, Vickers hardness in the longitudinal direction
At 15 or less, the most stable feed load is shown.
In the case of Examples 1, 2 and 4 in which the hardness deviation between the circular cross section and the longitudinal direction is within the control range, not only the feedability was good due to the low feed load, but also a stable arc was shown. . However, in the case of Examples 3 and 5, the hardness deviation value of either the circular cross section or the longitudinal direction is not included in the control range, and the feeding load tends to increase. this is,
This is because the contact area ratio consists of the sum of the reduced surface contact ratio and the straightening contact ratio, and it is stable if not only the total of the contact area ratios but the reduced surface contact ratio and the straightening contact ratio are not controlled within a certain range at the same time. It can be said that this indicates that it is not possible to secure feedability.

【００３５】一般に、ワイヤの２ターン溶接試験では、
送給負荷が２．１程度の場合にはアークが不安定にな
り、２．１以上の数値では溶接は可能だが、不安定なア
ークによって連続溶接では適用出来ないレベルといえ
る。Generally, in a two-turn welding test of a wire,
When the feeding load is about 2.1, the arc becomes unstable, and welding can be performed with a value of 2.1 or more, but it can be said that the level cannot be applied to continuous welding due to the unstable arc.

【００３６】[0036]

【発明の効果】以上説明したように、アーク溶接用ワイ
ヤをビッカース硬度計で測定した硬度が、ワイヤ断面上
の中心部と表面との硬度差がHv１８以下であり、長手方
向の硬度差がワイヤの任意の２００ｍｍ間隔で測定した
時、Hv１５以下に管理することによって、ワイヤの残留
応力の分布を均一にし、ワイヤの送給性を向上させるこ
とが出来る。As described above, the hardness of the arc welding wire measured by the Vickers hardness tester is such that the hardness difference between the center and the surface of the wire cross section is Hv18 or less, and the hardness difference in the longitudinal direction is the wire. When measured at an arbitrary 200 mm interval, the distribution of residual stress of the wire can be made uniform and the feedability of the wire can be improved by controlling to Hv15 or less.

【００３７】また、本発明は、ワイヤとダイスとが接触
して生じる接触面積を一定範囲に管理し、ワイヤの硬度
偏差を減少させることによって、ワイヤの残留応力の分
布が均一なアーク溶接用ワイヤを提供し、具体的方法と
して、伸線工程の最終段階における伸線を２段階に分離
して行う伸線方法を提供する。Further, according to the present invention, the contact area produced by the contact between the wire and the die is controlled within a certain range, and the hardness deviation of the wire is reduced, whereby the distribution of the residual stress of the wire is uniform. And, as a concrete method, a wire drawing method in which the wire drawing in the final stage of the wire drawing step is separated into two steps.

【図面の簡単な説明】[Brief description of drawings]

【図１】（ａ）ワイヤが送給ローラを通過する際の概略
横断面図。（ｂ）ワイヤが送給ローラを通過する際の概
略縦断面図。FIG. 1A is a schematic cross-sectional view of a wire passing through a feeding roller. (B) A schematic vertical cross-sectional view when the wire passes through the feeding roller.

【図２】ワイヤのダイス通過時の減面接触部と矯正接触
部の概略図。FIG. 2 is a schematic view of a reduction surface contact portion and a straightening contact portion when a wire passes through a die.

【図３】本発明による伸線工程の最終段階での伸線を２
段階工程の実施例を示す概略図。FIG. 3 shows the wire drawing at the final stage of the wire drawing process according to the present invention.
6 is a schematic view showing an example of a step process. FIG.

【図４】本発明の実施例において適用したワイヤの送給
性テスト方法(２ターン送給性試験)の概略図。FIG. 4 is a schematic diagram of a wire feedability test method (2-turn feedability test) applied in an example of the present invention.

【符号の説明】[Explanation of symbols]

１ ローラ ３ 溶接トーチ ２０ 減面接触部 ２００ ベアリング部（矯正接触部） Ｗ ワイヤ Ｄ 伸線ダイス Ｐ 荷重 1 roller 3 welding torch 20 Reduced surface contact area 200 Bearing part (straightening contact part) W wire D Wire drawing die P load

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B23K 35/40 B23K 35/02 ─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. 7 , DB name) B23K 35/40 B23K 35/02

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 １次伸線と、前記１次伸線後のワイヤの
加工硬化を回復するための熱処理と、２次伸線と、前記
２次伸線後のワイヤ内部の残留応力を除去するための熱
処理、及び３次伸線を順次行うことにより製造され、 前記３次伸線が、前記ワイヤを実質的に減面させるため
に、伸線されるワイヤとの接触角が小さい減面接触部
と、長さの短いベアリングとを備えた第１ダイスと、 前記第１ダイスに連続的に配置され、前記ワイヤの線径
を矯正するために前記第１ダイスに比べて長さが長いベ
アリングによって構成される矯正接触部を持った第２ダ
イスによって連続的に伸線することによって、ビッカー
ズ硬度において、 ワイヤの中心部と表面との硬度差が１
８以下で、２００ｍｍ間隔の長手方向の硬度差が１５以
下であることを特徴とするアーク溶接用ワイヤ。 1. A primary wire drawing and a wire after the primary wire drawing
Heat treatment for recovering work hardening, secondary wire drawing, and
Heat for removing residual stress inside the wire after secondary wire drawing
Manufactured by sequentially performing treatment and third wire drawing, the third wire drawing substantially reducing the surface area of the wire.
, A reduced surface contact part with a small contact angle with the drawn wire
And a first die including a bearing having a short length, and a wire diameter of the wire, which is continuously arranged on the first die.
In order to straighten the
No. 2 das with a straightening contact formed by the ring
By drawing continuously with a chair, Vicker
In's hardness, the hardness difference between the center portion and the surface of wire and is 1
An arc welding wire having a hardness difference of 8 or less and a longitudinal hardness difference of 200 mm intervals of 15 or less. 【請求項２】 前記ワイヤの中心部と表面との硬度差、
及びワイヤの長手方向の硬度差は、次の式によって定義
される接触面積比を３乃至３．５の範囲で特定すること
によって調整することを特徴とする請求項１記載のアー
ク溶接用ワイヤ。 （式） 接触面積比＝減面接触比＋矯正接触比減面接触比＝減面接触部の接触面積／第１ダイスに引き
込まれるワイヤの断面積 矯正接触比＝矯正接触部の接触面積／第２ダイスから引
出されるワイヤの断面積 2. The hardness difference between the center and the surface of the wire,
The wire for arc welding according to claim 1, wherein the hardness difference in the longitudinal direction of the wire is adjusted by specifying a contact area ratio defined by the following equation within a range of 3 to 3.5. (Formula) pulling the contact area / first die contact area ratio = area reduction contact ratio +矯 positive contact declined surface contact ratio = reduction of area contact portion
Cross-sectional area of wire to be inserted Straightening contact ratio = contact area of straightening contact part / subtracted from second die
Cross section area of wire 【請求項３】 １次伸線と、前記１次伸線後のワイヤの
加工硬化を回復するための熱処理と、２次伸線と、前記
２次伸線後のワイヤ内部の残留応力を除去するための熱
処理、及び３次伸線を包含するアーク溶接用ワイヤの伸
線方法であって、 前記３次伸線は、 伸線されるワイヤとの接触角が小さくベアリングの長さ
が短い第１ダイスによってワイヤの中心部と表面との硬
度差を緩和する工程と、 前記第１ダイスに対して接触角が大きくベアリングの長
さが長い第２ダイスによるワイヤの長手方向の硬度差を
緩和する工程を包含することを特徴とする アーク溶接用
ワイヤの伸線方法。3. A primary wire drawing and a wire after the primary wire drawing
Heat treatment for recovering work hardening, secondary wire drawing, and
Heat for removing residual stress inside the wire after secondary wire drawing
Processing and drawing of wire for arc welding including tertiary drawing
In the wire drawing method, the third wire drawing has a small contact angle with the wire to be drawn and the length of the bearing.
The first die, which has a short length
The process of reducing the difference in degree and the contact angle with the first die are large and the bearing length is long.
Of the hardness difference in the longitudinal direction of the wire due to the long second die
A wire drawing method for an arc welding wire, which comprises a step of relaxing .
JP2001189298A 2000-06-28 2001-06-22 Arc welding wire and wire drawing method Expired - Lifetime JP3457652B2 (en)

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KR1020000036126A KR100359482B1 (en) 2000-06-28 2000-06-28 Wire for arc-welding and wire drawing method

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CN1332056A (en) 2002-01-23
KR100359482B1 (en) 2002-10-31
KR20020003980A (en) 2002-01-16
US6791064B2 (en) 2004-09-14
US20020014477A1 (en) 2002-02-07

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